@ottknott: As a person who travels to another continent often and every year I find that the best thing to buy if you are going to a particular country for an extended period or go to that country often is a SIM card from that country. This will make sure you are connected all throughout. And as for Mexico this article will summarize what you can buy; https://www.mexicotravelsecrets.com/mexico-sim-card/ and from the looks of it it's pretty cheap the cell plans over there.
In general there's many countries out there where cell phone plans are far cheaper than in Canada, so if you like to do a bit of research and ask some locals or friends living in that country, then you are in for a real deal. 🙂 🙂
